.acn {
    --acn-border: #dfe5ee;
    --acn-bg: #ffffff;
    --acn-soft: #f5f7fb;
    --acn-text: #1f2937;
    --acn-muted: #6b7280;
    --acn-accent: #2563eb;
    --acn-accent-soft: #eff6ff;
    color: var(--acn-text);
    background: var(--acn-bg);
    border: 1px solid var(--acn-border);
    border-radius: 16px;
    padding: 18px;
    margin: 18px 0;
    box-sizing: border-box;
}
.acn * { box-sizing: border-box; }
.acn__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}
.acn__title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    line-height: 1.25;
}
.acn__subtitle {
    margin-top: 4px;
    color: var(--acn-muted);
    font-size: 13px;
}
.acn__sort {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--acn-muted);
    font-size: 13px;
    white-space: nowrap;
}
.acn__sort select {
    min-height: 34px;
    border: 1px solid var(--acn-border);
    border-radius: 10px;
    padding: 0 10px;
    background: #fff;
}
.acn__groups {
    display: grid;
    gap: 12px;
}
.acn__group {
    display: grid;
    grid-template-columns: 46px 1fr;
    align-items: start;
    gap: 10px;
}
.acn__group-title {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--acn-soft);
    color: var(--acn-muted);
    font-weight: 700;
    font-size: 12px;
}
.acn__letters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.acn-letter {
    min-width: 34px;
    height: 34px;
    border: 1px solid var(--acn-border);
    border-radius: 10px;
    background: #fff;
    color: var(--acn-text);
    cursor: pointer;
    font-weight: 600;
    transition: transform .12s ease, border-color .12s ease, background-color .12s ease;
}
.acn-letter:hover,
.acn-letter.is-active {
    border-color: var(--acn-accent);
    background: var(--acn-accent-soft);
    color: var(--acn-accent);
}
.acn-letter:active { transform: translateY(1px); }
.acn__state {
    margin: 16px 0 10px;
    color: var(--acn-muted);
    font-size: 14px;
}
.acn__state.is-loading::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: acn-spin .75s linear infinite;
}
@keyframes acn-spin { to { transform: rotate(360deg); } }
.acn__result {
    display: grid;
    gap: 10px;
}
.acn-item {
    padding: 14px;
    border: 1px solid var(--acn-border);
    border-radius: 14px;
    background: var(--acn-soft);
}
.acn-item__title {
    display: inline-block;
    color: var(--acn-text);
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    line-height: 1.35;
}
.acn-item__title:hover { color: var(--acn-accent); }
.acn-item__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    margin-top: 8px;
    color: var(--acn-muted);
    font-size: 13px;
}
.acn-item__meta a {
    color: inherit;
    text-decoration: none;
}
.acn-item__meta a:hover { color: var(--acn-accent); }
.acn-empty {
    padding: 16px;
    border-radius: 14px;
    background: var(--acn-soft);
    color: var(--acn-muted);
}
.acn__pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 14px;
}
.acn-page {
    min-width: 34px;
    height: 34px;
    border: 1px solid var(--acn-border);
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
}
.acn-page.is-active {
    background: var(--acn-accent);
    border-color: var(--acn-accent);
    color: #fff;
}
@media (max-width: 640px) {
    .acn { padding: 14px; border-radius: 14px; }
    .acn__header { flex-direction: column; }
    .acn__sort { width: 100%; justify-content: space-between; }
    .acn__sort select { flex: 1; }
    .acn__group { grid-template-columns: 1fr; }
    .acn__group-title { justify-content: flex-start; padding: 0 10px; }
    .acn-letter { min-width: 36px; height: 36px; }
}